Enable universal accelerated overflow scroll

Source/core/testing/Internals.idl

Index: Source/core/testing/Internals.idl
diff --git a/Source/core/testing/Internals.idl b/Source/core/testing/Internals.idl
index a7a35c04722f027e667063b36190dcf17bb0d6ef..de07567b04cc1c9f56fb18ab45da61601e307d8f 100644
--- a/Source/core/testing/Internals.idl
+++ b/Source/core/testing/Internals.idl
@@ -178,12 +178,8 @@
     [RaisesException] DOMString layerTreeAsText(Document document, optional unsigned short flags);
     [RaisesException] DOMString elementLayerTreeAsText(Element element, optional unsigned short flags);
 
-    [RaisesException] NodeList paintOrderListBeforePromote(Element element);
-    [RaisesException] NodeList paintOrderListAfterPromote(Element element);
-
     [RaisesException] boolean scrollsWithRespectTo(Element element1, Element element2);
     [RaisesException] boolean isUnclippedDescendant(Element element);
-    [RaisesException] boolean needsCompositedScrolling(Element element);
 
     // The values of these constants must be kept in sync with those in RenderLayer.
     const unsigned short DO_NOT_FORCE_COMPOSITED_SCROLLING = 0;